Textile machinery



March 6, 1934. w. Pool.

TEXTILE. MACHINERY Filed Oct. 30, 1951 MEKTOR llllll Il FIG.-

WILUAM Poor.

FIG

-- I-- :SHJ iw .EN 1 m Patented Mar. 6, 1934 PATENT OFFICE TEXTILE MACHINERY William Pool, Spondon, near, Derby, England, assignor to Celanese Corporation of America, a

corporation of Delaware Application Octobexl 30, 1931, Serial No. 571,971 In Great Britain December 24, 1930 '4 claims. (c1. 117-23) This invention relates to devices for the twisting of textile yarns, filaments, or threads (hereinafter referred to as threads) and more particularly to devices adapted to impart more than one turn of twist to a thread for each revolution of the twisting device.

In such devices, the package from which the thread is to be wound does not partake of the revolution of the twisting device. The thread is l0 drawn olf the package and made to form a loop which is carried round the package-itself bythe rotation applied to the device. Assuming the package to be stationary, two turns of twist are imparted for each revolution of the loop about the package. Rotation of the package itself in a direction opposite to that of the loop enables a higher rate of twisting to be obtained for the same rate of revolution applied to the device.

The objectv of the invention is to provide a twisting device of the above character in which the package holder is prevented from partaking of the applied twisting revolutions in a simple and eiective manner. the device being of a compact nature and absorbing little power in its operation.

According to the invention -a thread twisting device for imparting more than one turn of twist to a thread for each revolution applied to the device, comprises a pair of interconnected friction 'wheels carried by a rotatable spindle on which is freely mounted a thread package support, the friction wheels being capable of rotation in contact respectively with an annular -race onthe thread package support andan annular 85 race independent of the package, whereby the rotation of one wheel by its engagement with the independent race as it is carried bodily round by the rotation of the spindle produces a corresponding rotation of the other wheel, so that the package support is frctionally geared to the independent race. l

The wheels on the rotatable spindle which serve to restrain rotation of the package support may have the form of a pair of wheels coupled together so that their common axis lies parallel to that of the twisting device, and carried by an enlarged portion of the spindle, which connected wheels frictionally contact with a race on the package support and an independent race.

Two such pairs of wheels may be provided diametrically opposite each other and at an equal distance from the axis of the spindle to give balance, though three or more pairs may be utilized, preferably in symmetrical arrangement.

The wheels are preferably freely journalled tion of the spindlefkeeps the wheels in firm contact with the races, so reducing to a minimum the possibility of slip between the rotating wheels and the races. low hub, loosely tting a journal pin carried by the spindle, or' they may be carried by a journal pin'loosely fitting into recesses in a part connected to the spindle, or into holes in blocks slidable in slots or recesses in such part.

, If the pair of wheels and the two races are respectively of equal diameters, and the independent race is retained stationary, i the package holder is likewise held stationary.' there being very 1 little tendency for slip to take place since prac 70 tically no power requires to be transmitted through the friction drive furnished by the wheels and races. This arrangement, i. e., one in which the package holder is prevented from moving, is particularly useful in enabling double twisting of threads to be eiected in a simple manner on vertical twisting devices, in which it is impossible to use gravity to prevent rotation of the packages (as in the case of horizontal devices) and allows the compactness resulting from the use of vertical spindles to be utilized. The device may, however, be used with the spindle inclined or horizontal.

By Variation in the sizes of the wheels and races, and/ or by causing the independent lrace to rotate, the package may also be rotated, within the power of the friction drive to transmit the power necessary for this purpose without substantial slip.

Theinvention will now be described in greater 00 detail with reference to the accompanying drawing which illustrate a twisting device having a vertical axis, but it is to be understoood that this description is given by way of example only and is in no respect limitative.

Fig. 1 shows a vertical section of a twisting spindle according to the invention, the section being taken on the line 1-1 of Fig. 3;

Figs. 2 and 3 show two sectional plans across different planes 2--2 and 3-3 of the twisting 100A spindle shown in Fig. 1; and ,A

Fig. 4 shows a modified detail of the spindle shown in Fig. l.

Referring to Fig. 1, a support 6 adapted to carry a bobbin shown in chain dotted lines at '7, or if 105 desired a cone, or other yarn package, is freely mounted through ball bearings on a rotatable hollow driving spindle 9, the spindle 9 being adapted to be driven at a high rate of revolution by means of a wharl 10. The ball bearings 8 may 110 Thus the wheels may have a hol- 00 be in the form of/a thrust bearing so that the `tendency of the weight of the package 7 to cause rotation of thesupport 6 through frictional contact with the rotating spindle '9 is minimized. The spindle 91s rotated in suitable anti-friction bearings 11 mounted on a bolster rail 12.

The hollow spindle 9 is enlarged at 13between the package support 6 and the wharll'U, the enlarged portion being of disc-like form and provided with a passage 14 at right-angles to the axis of the spindle which communicates with the hollow bore 15 of the spinde. The enlarged portion is further provided with two or more symmetrically arranged recesses16 in each of which is arranged a roller 17 having its axis parallel to that of the spindle 9. f'At the upper. and lower ends of the roller 17 are anges 18, 19 constituting vtact against the race 22.

friction wheels, the wheels 18, 19 being of the samesize. A bearing pin 20 passes through the upper and lower walls of each recess 16, and through the axial bore of the corresponding roller 17, the bore of the roller being slightly larger than the diameter of the bearing pin 20, so that the roller :lits loosely thereon.

Forming an integral part of the package support 6 is a ring or depending annular race 21, with which internal contact is made by the upper wheel 18 on each rollerf A further race 22 of the same diameter as the first race 21 is secured to the supporting bracket 23 of the spindle, which bracket is attached to the bolster rail 12. The lower wheel 19 of each roller makes internal con- When the spindle 9 is rotated, the wheels 18, 19 are carried round by the spindle and are caused to bear firmly against the races 21, 22

' under the action of centrifugal force owing to the free mounting of the rollers 16 on their journals Since thelower wheels 19 bear against the xed race 22, the wheels rotate about the journal pins so that the upper wheels 18 are caused to roll over the surface of the upper race 21 secured to the package support 6. As there is the same relative motion between the lower wheels 19 of the fixed race 22 as between the upper wheels 18 and the race 21 attached to the stationary support 6, the package support is caused to remain stationary.

The recesses 16 for the rollers 17 almost entirely enclose the wheels 18, 19, and the enlarged portion13 of the4 spindle 9 has upwardly and downwardly extending anges 24 at its periphery to enclose the two races 21, 22, thus forming a compact device of a diameter only slightly larger than the greatest width of the package.

For the purpose of guiding the thread as it issues from the passage 14, the rotating spindle 6 carries a projecting flange 26 and a guard mem.

ber 27, to prevent licking, which guard member may carry another flange 28 at its upper edges.

At the top of the bobbin 7 is a thread disc 30 for the purpose of guiding the thread from the bobbin surface to the axis ofthe bobbin, and this may conveniently be mounted with ball bearings 31 on a hollow tube 32, which is fixed by means of springs 33 into the top of the bobbin, and-supported thereon by flanges 34. The springs 33 centralize the tubular member 32 in the bore of the bobbin 9. I i

The thread 35 is led from the bobbin over the edge' of the disc 30, and down the tube 32 -to the inside 15 of the hollow spindle 9. The thread .35 then passes out through the passage 14 and :round` the edge of the fiange 26, flying out on fellecting device (not shown).

. `Lattanzi Y 'twisting ldevice.` On leaving the guide eye 37,

the. thread passes` for collection to any suitable The provision of the ange 28 prevents the thread extending from the lower flange 26 to theV guide' eye 373--- frem being engaged by the thread package when the twisting Vdevice is set in motion, and before centrifugal force has caused the balloon 36fto assume its maximum dimension. The guard 27 also prevents any lubricant being thrown on to the thread being twisted. Instead of the thread passing as a balloon 36 through the open air, a tubular or other guide may be provided from the rotating spindle 9 to or towards the thread guide 37.

Fig. 2- shows a section of the twisting device through` the plane of the passage 14, and it will be appreciated that the disposition of the tworollers 17 is shown atright-angles to the direction of the passage 14. The manner in Vwhich the lower friction wheel 19 bears against the annular race 22 vis clearly shown in this figure, the bearing of the wheels 18 against the race 214 being precisely similar.r

Fig. 3 shows a horizontal section of the device immediately over the enlarged portion 13. Alternatively or in addition to mounting the rollers 17 loosely on the spindles 20, the spindles may be mounted in slots 40 inthe upper and lower walls of the recesses 16, so that the frictional wheels 18, 19 are free to fly, out under centrifugal force and to bear firmly against the races 21, 22.

' In Fig. 4 a thread guiding disc 30 mounted on top of the bobbin 7 is shown, the disc being in this case fixed to the tube 32 and secured' thereon by means of a spring ring 41. The thread passing from the bobbinv 7 over the edge of the disc 30 encounters slightly more resistance than is the case with the device shownl in Fig. 1,

and'spreferable for its simplicity where the L more delicate device shown in Fig. 1 is unnecessary.

The twisted thread may be collected vby* simple winding, or may be further twisted, or doubled with other similarly twisted or other threads by means of a suitable twisting device such as a ring spindle.

The twisting device according tothe invention may be adapted to the twisting of thread wound on different kinds of packages, provided that the spindle is arranged to guide .the ballooning thread clear of the package. Thus the enlarged portion of the spindle may be made of slightly greater diameter than the diameter or horizontal width of the package, while the friction device can still be maintained small and compact.

What I claim and desire to secure by Letters Patent is:-'

1. A thread-twisting device of the character described comprising a spindle, a thread package support with respect to which the spindle is rotatable, a pair of friction wheels mounted on' said spindle and adapted to be carried round the axis of the spindle by the rotation thereof, an annular race stationary with relation to said spindle and a second annular race conment with their respective races so as to pre-- vent the package support from rotating with the spindle.

2. A thread-twisting device of the character described comprising a spindle, a thread package support with respect to which the spindle is rotatable, a pair of friction wheels 'mounted on said spindle and adapted to be carried round the axis of the spindle by the rotation thereof, an annular race stationary with relation to said spindle and a second annular race connected to the package support, the friction wheels being in driving connection with each other and slackly mounted in the spindle so that by the rotation thereof they are forced outwardly by centrifugal force to make frictional engagement with thel annular races and therebyto prevent the package support from rotating with the spindle.

3. A thread-twisting device of the character described comprising a spindle, a thread package support with respect to which the spindle is rotatable, a pair of friction wheels of equal diameter mounted on said spindle and adapted to be carried round the axis of the spindle by the rotation thereof, an annular race stationary with relation to said spindle and a second annular race of the same diameter connected to the package support, the friction Wheels being in driving connection with each other and "adapted to make frictional engagement with their respective races so as to hold the package support stationary notwithstanding the rotation of the spindle.

4. A thread-twisting device of the character described comprising aspindle, a thread packy age support with respect to which the spindle is rotatable, a pair of friction Wheels of equal diameter mounted on said spindle and adapted to be carried round the axis of the spindle by the rotation thereof, an annular race stationary with respect to said spindle and a second annular race of the same diameter connected to the package support, the friction wheels being in driving connection with each other and slackly mounted in the spindle so that by the rotation thereof they are forced outwardly by centrifugal force to make frictional engagement with the annular races and thereby to hold the package support stationary notwithstanding the rotation of the spindle.

WILLIAM POOL. 

